| From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: track_io_timing default setting |
| Date: | 2021-12-10 16:22:51 |
| Message-ID: | 1dd8f9999f795519d5521e1a086135c63783b6b4.camel@cybertec.at |
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| Lists: | pgsql-hackers |
On Fri, 2021-12-10 at 10:20 -0500, Tom Lane wrote:
> Jeff Janes <jeff(dot)janes(at)gmail(dot)com> writes:
> > Can we change the default setting of track_io_timing to on?
>
> That adds a very significant amount of overhead on some platforms
> (gettimeofday is not cheap if it requires a kernel call). And I
> doubt the claim that the average Postgres user needs this, and
> doubt even more that they need it on all the time.
> So I'm -1 on the idea.
I set "track_io_timing" to "on" all the time, same as "log_lock_waits",
so I'd want them both on by default.
Yours,
Laurenz Albe
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